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Want to make that the latest piece of either your "Rock Band" arsenal or your Green Day memorabilia collection (or both)? All you need to do is take on the following challenge: What makes Green Day rock? Be imaginative, be creative, be passionate and be convincing.

All you need to do is think about why Green Day rock, then record a 30-second answer on video. Head on over to Your.MTV.com to upload your entry, and MTV News will select the best clip.